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how to lisk unique keys in boost multi_index_container
by Bill Tian 02 Dec '14

02 Dec '14

hello,every one now i have a struct like this struct a { a(const std::string &m1_, const std::string &m2_, boost::int16_t m3_) : m1(m1_),m2(m2_), m3(m3_) {} std::string m1; std::string m2; boost::int16_t m3; }; typedef boost::multi_index::multi_index_container < a, boost::multi_index::indexed_by< boost::multi_index::hashed_unique< BOOST_MULTI_INDEX_MEMBER(a, std::string, m1) >, boost::multi_index::ordered_non_unique< … [View More]

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Error "Used Uninitialized" in boyer_myrvold_impl.hpp
by wanglurg 02 Dec '14

02 Dec '14

Hi, guys, I'm a new boost graph library user. I met an error when using boyer_myrvold_planar_test() function in Boost_1_55_0 to generate the kuratowski subgraph. Error message is listed as follows: ./boost/graph/planar_detail/boyer_myrvold_impl.hpp:1545:11 error: 'z' may be used uninitialized in this function. I added a "Wno-maybe-uninitialized" flag to Makefile to remove this error temporarily, but it's not a good method. I'm looking for a better way to fix this. Does anyone encounter the … [View More]

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Does Boost 1.56 boost::async support auto scheduling (launch deferred)?
by Adi Shavit 02 Dec '14

02 Dec '14

Hi, Onc of the design choices for async() default launch policy was to allow the OS scheduler to decide whether or not to launch a new thread or remain on the same thread (presumably based on available system resources). Does Boost 1.56 or 1.57 support this default auto scheduling yet? It seems to be launching as many threads as tasks. Thanks, Adi

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Boost build and first program
by Great Avenger Singh 01 Dec '14

01 Dec '14

Hi I am first time boost user. I build it using following procedure on Ubuntu Linux 14.04. cd /boost-src/ ./bootstrap.sh and followed instructions. after the completion it gave me following suggestion: The Boost libraries were successfully built. Following directory should be included to compiler include paths; /home/metal-machine/boost-src Following directory should be included to linker library paths; /home/metal-machine/boost-src/stage/lib Now I try to compile and … [View More]

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fatal error: 'boost/utility/detail/result_of_iterate.hpp' file not found
by Ted Middleton 01 Dec '14

01 Dec '14

I'm trying to build boost 1.56.0 for OSX 10.10 with Xcode 5.1.1 (clang-503.0.40). Xcode 5.1.1 Build version 5B1008 Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn) Target: x86_64-apple-darwin14.0.0 Thread model: posix When I try to build boost thread, the compile fails building thread.cpp on the command: "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pedantic -gdwarf-2 -fexceptions -Wno-long-long -Wextra -Wno-long-long -Wno-variadic-macros -Wunused-… [View More]function -fpermissive -pedantic -DBOOST_ALL_NO_LIB=1 -DBOOST_ATOMIC_STATIC_LINK=1 -DBOOST_SYSTEM_STATIC_LINK=1 -DBOOST_THREAD_BUILD_LIB=1 -DBOOST_THREAD_DONT_USE_CHRONO -DBOOST_THREAD_POSIX -DNDEBUG -I"." -c -o "bin.v2/libs/thread/build/darwin-4.2.1/release/link-static/threading-multi/pthread/thread.o" "libs/thread/src/pthread/thread.cpp" The error is: In file included from libs/thread/src/pthread/thread.cpp:19: In file included from ./boost/thread/future.hpp:22: In file included from ./boost/thread/detail/invoker.hpp:28: In file included from ./boost/utility/result_of.hpp:202: ./boost/preprocessor/iteration/detail/iter/forward1.hpp:47:18: fatal error: 'boost/utility/detail/result_of_iterate.hpp' file not found ./boost/preprocessor/iteration/detail/iter/forward1.hpp:27:56: note: expanded from macro 'BOOST_PP_FILENAME_1' # define BOOST_PP_FILENAME_1 BOOST_PP_ARRAY_ELEM(2, BOOST_PP_ITERATION_PARAMS_1) ^ ./boost/utility/result_of.hpp:201:68: note: expanded from macro 'BOOST_PP_ITERATION_PARAMS_1' #define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_RESULT_OF_NUM_ARGS,<boost/utility/detail/result_of_iterate.hpp>)) ^ ./boost/preprocessor/array/elem.hpp:23:114: note: expanded from macro 'BOOST_PP_ARRAY_ELEM' # define BOOST_PP_ARRAY_ELEM(i, array) BOOST_PP_TUPLE_ELEM(BOOST_PP_ARRAY_SIZE(array), i, BOOST_PP_ARRAY_DATA(array)) ^ note: (skipping 10 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) ./boost/preprocessor/tuple/rem.hpp:23:31: note: expanded from macro 'BOOST_PP_REM' # define BOOST_PP_REM(...) __VA_ARGS__ ^ ./boost/preprocessor/variadic/elem.hpp:26:89: note: expanded from macro 'BOOST_PP_VARIADIC_ELEM' # define BOOST_PP_VARIADIC_ELEM(n, ...) BOOST_PP_CAT(BOOST_PP_VARIADIC_ELEM_, n)(__VA_ARGS__,) ^ ./boost/preprocessor/variadic/elem.hpp:30:55: note: expanded from macro 'BOOST_PP_VARIADIC_ELEM_2' # define BOOST_PP_VARIADIC_ELEM_2(e0, e1, e2, ...) e2 Sure enough, boost/utility/detail/result_of_iterate.hpp doesn't exist from the base of the project. It does if you start at libs/utlility/include/boost/utility/detail, though. Most of what's in boost/ is a symlink to directories in libs (I guess this is how modulization works), and if boost/utility were a symlink libs/utility/include/boost/utility, I think this code in forward1.hpp would work. But boost/utility isn't a symlink - boost/utility is an actual directory with a few symlinks to files in it, but none of them leads to result_of_iterate.hpp. There's an email (http://lists.boost.org/Archives/boost/2014/07/215233.php) to the developers list from back in July discussing this build break in the 1.56.0 beta 1, but I'm seeing this at the tag boost-1.56.0 for the 1.56.0 release in git.I don't seem to be able to build 1.57.0 either. Boost 1.56.0 wouldn't have shipped with a broken boost thread compile on OSX 64-bit, so I'm certain that its something bad that I've done. Can anyone figure out what I'm doing wrong from that command line or the error printout? [View Less]

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[Boost-users][Spirit] Semantic Action for a map of a map
by Ryan 01 Dec '14

01 Dec '14

I posted this question to the Boost Spirit mailing list but there doesn't seem to be much traffic there. I'm hoping that the main mailing list also has a few Spirit users as well and can possible receive some help. I'm wanting to add a semantic action for a complex rule. I'm not entirely sure this is the correct design. I need to parse the following EBNF grammar. EBNF value = (a-zA-Z_0-9)* tag = (a-zA-Z_) value tagValue = tag '=' value list = "@list=" tag '=' tag ',' (tagValue ',')* "@end" … [View More]info = tag (',' (tagValue | list) )* I thought if I defined the basic rules I could then created a custom instance of that rule with a semantic action. I did that for the first "tag" in the info definition and it seem to work well. I was also able to create this custom instance for the "tagValue" rule within the info definition. The problem is how to create the custom instance for list. The list result goes into a map of a map that I've created within my class. I'm not sure how to treat the tag=tag as the key and let the tagValue be the value. Any help with the semantic action or changing the design would be appreciated. This is my first time using Spirit and the learning curve is proving to be difficult. Ryan #include <string> #include <map> #include <utility> #include <boost/spirit/include/phoenix.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/std_pair.hpp> class Bob { typedef std::pair<std::string, std::string> infoPair; typedef std::map<std::string, std::string> infoMap typedef std::map<std::string, infoMap> infoMap2; std::string m_Name; infoMap m_Arguments; infoMap2 m_ArgumentCollection; public: bool const parseMessage(std::string const& message) { namespace qi = boost::spirit::qi; namespace phx = boost::phoenix; typedef std::string::const_iterator iter; qi::rule<iter, std::string()> value = *qi::char_("a-zA-Z_0-9"); qi::rule<iter, std::string()> tag = qi::char_("a-zA-Z_") >> value; qi::rule<iter, infoPair()> tagValue = tag >> '=' >> value; qi::rule<iter, std::string()> name = tag[ phx::bind(&Bob::m_Name, this) = qi::_1 ]; qi::rule<iter, infoMap()> tagValueMap = tagValue[ [=](infoPair& p, qi::unused_type, qi::unused_type) { m_Arguments[p.first] = p.second; } ]; //The compiler wants an infoPair. Not really sure that is what I need. qi::rule<iter, infoPair()> list = "@list=" >> tag >> '=' >> tag >> ',' >> *(tagValue >> ',') >> "@end"; //How can I create a custom version of list (like I did for tag) to assign a semantic action. //The action needs to allow tag=tag be the key to m_ArgumentCollection and place all //the repeating tagValue items into its value. auto first(message.begin()), last(message.end()); bool results = qi::parse(first, last, name >> (*(',' >> tagValueMap))); //Something like this as the final form to the grammar. //bool results = qi::parse(first, last, name >> (*(',' >> (tagValueMap | customList)))); if (!results || first != last) return false; return true; } }; int main(void) { Bob bob; bob.parseMessage("hello,this=great,@list=alice=here,wish=fish,@end,look=good"); return 0; } [View Less]

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LibBoost - Asio - SerialPort - set_option throw an exception
by Mikael Plouhinec 01 Dec '14

01 Dec '14

Hello, I have some problem using the libboost asio to communicate with serial port. I want to open my serial port with : m_Balance.open(BalancePort, (unsigned int)9600, boost::asio::serial_port_base::parity(boost::asio::serial_port_base::parity::even), boost::asio::serial_port_base::character_size((unsigned int)7), boost::asio::serial_port_base::flow_control( boost::asio::serial_port_base::flow_control::hardware), boost::asio::serial_port_base::stop_bits(boost::asio::serial_port_base::… [View More]stop_bits::one)); but I have an exception with the character_size : Invalid Argument I put some log in the open method and I have found that my problem is on the set_option of the character size. Can someone help me? Thanks a lot. Mike Libboost is on Debian Wheezy : version 1.49 I use the following Serial Class (cpp) : /* * File: Serial.cpp * Author: Terraneo Federico * Distributed under the Boost Software License, Version 1.0. * Created on September 12, 2009, 3:47 PM * * v1.05: Fixed a bug regarding reading after a timeout (again). * * v1.04: Fixed bug with timeout set to zero * * v1.03: Fix for Mac OS X, now fully working on Mac. * * v1.02: Code cleanup, speed improvements, bug fixes. * * v1.01: Fixed a bug that caused errors while reading after a timeout. * * v1.00: First release. */ #include "Serial.h" #include <string> #include <algorithm> #include <iostream> #include <boost/bind.hpp> using namespace std; using namespace boost; CSerial::CSerial(): io(), port(io), timer(io), timeout(posix_time::seconds(0)) {} CSerial::CSerial(const std::string& devname, unsigned int baud_rate, asio::serial_port_base::parity opt_parity, asio::serial_port_base::character_size opt_csize, asio::serial_port_base::flow_control opt_flow, asio::serial_port_base::stop_bits opt_stop) : io(), port(io), timer(io), timeout(posix_time::seconds(0)) { open(devname,baud_rate,opt_parity,opt_csize,opt_flow,opt_stop); } void CSerial::open(const std::string& devname, unsigned int baud_rate, asio::serial_port_base::parity opt_parity, asio::serial_port_base::character_size opt_csize, asio::serial_port_base::flow_control opt_flow, asio::serial_port_base::stop_bits opt_stop) { if(isOpen()) close(); port.open(devname); Log.AddLine("set 1", LOG_DEBUG); port.set_option(asio::serial_port_base::baud_rate(baud_rate)); Log.AddLine("set 2", LOG_DEBUG); port.set_option(opt_parity); Log.AddLine("set 3", LOG_DEBUG); port.set_option(opt_csize); Log.AddLine("set 4", LOG_DEBUG); port.set_option(opt_flow); Log.AddLine("set 5", LOG_DEBUG); port.set_option(opt_stop); Log.AddLine("set 6", LOG_DEBUG); } bool CSerial::isOpen() const { return port.is_open(); } void CSerial::close() { if(isOpen()==false) return; port.close(); } void CSerial::setTimeout(const posix_time::time_duration& t) { timeout=t; } void CSerial::write(const char *data, size_t size) { asio::write(port,asio::buffer(data,size)); } void CSerial::write(const std::vector<char>& data) { asio::write(port,asio::buffer(&data[0],data.size())); } void CSerial::writeString(const std::string& s) { asio::write(port,asio::buffer(s.c_str(),s.size())); } void CSerial::read(char *data, size_t size) { if(readData.size()>0)//If there is some data from a previous read { istream is(&readData); size_t toRead=min(readData.size(),size);//How many bytes to read? is.read(data,toRead); data+=toRead; size-=toRead; if(size==0) return;//If read data was enough, just return } setupParameters=ReadSetupParameters(data,size); performReadSetup(setupParameters); //For this code to work, there should always be a timeout, so the //request for no timeout is translated into a very long timeout if(timeout!=posix_time::seconds(0)) timer.expires_from_now(timeout); else timer.expires_from_now(posix_time::hours(100000)); timer.async_wait(boost::bind(&CSerial::timeoutExpired,this, asio::placeholders::error)); result=resultInProgress; bytesTransferred=0; for(;;) { io.run_one(); switch(result) { case resultSuccess: timer.cancel(); return; case resultTimeoutExpired: port.cancel(); throw(timeout_exception("Timeout expired")); case resultError: timer.cancel(); port.cancel(); throw(boost::system::system_error(boost::system::error_code(), "Error while reading")); //if resultInProgress remain in the loop } } } std::vector<char> CSerial::read(size_t size) { vector<char> result(size,'\0');//Allocate a vector with the desired size read(&result[0],size);//Fill it with values return result; } std::string CSerial::readString(size_t size) { string result(size,'\0');//Allocate a string with the desired size read(&result[0],size);//Fill it with values return result; } std::string CSerial::readStringUntil(const std::string& delim) { // Note: if readData contains some previously read data, the call to // async_read_until (which is done in performReadSetup) correctly handles // it. If the data is enough it will also immediately call readCompleted() setupParameters=ReadSetupParameters(delim); performReadSetup(setupParameters); //For this code to work, there should always be a timeout, so the //request for no timeout is translated into a very long timeout if(timeout!=posix_time::seconds(0)) timer.expires_from_now(timeout); else timer.expires_from_now(posix_time::hours(100000)); timer.async_wait(boost::bind(&CSerial::timeoutExpired,this, asio::placeholders::error)); result=resultInProgress; bytesTransferred=0; for(;;) { io.run_one(); switch(result) { case resultSuccess: { timer.cancel(); bytesTransferred-=delim.size();//Don't count delim istream is(&readData); string result(bytesTransferred,'\0');//Alloc string is.read(&result[0],bytesTransferred);//Fill values is.ignore(delim.size());//Remove delimiter from stream return result; } case resultTimeoutExpired: port.cancel(); throw(timeout_exception("Timeout expired")); case resultError: timer.cancel(); port.cancel(); throw(boost::system::system_error(boost::system::error_code(), "Error while reading")); //if resultInProgress remain in the loop } } } CSerial::~CSerial() {} void CSerial::performReadSetup(const ReadSetupParameters& param) { if(param.fixedSize) { asio::async_read(port,asio::buffer(param.data,param.size),boost::bind( &CSerial::readCompleted,this,asio::placeholders::error, asio::placeholders::bytes_transferred)); } else { asio::async_read_until(port,readData,param.delim,boost::bind( &CSerial::readCompleted,this,asio::placeholders::error, asio::placeholders::bytes_transferred)); } } void CSerial::timeoutExpired(const boost::system::error_code& error) { if(!error && result==resultInProgress) result=resultTimeoutExpired; } void CSerial::readCompleted(const boost::system::error_code& error, const size_t bytesTransferred) { if(!error) { result=resultSuccess; this->bytesTransferred=bytesTransferred; return; } //In case a asynchronous operation is cancelled due to a timeout, //each OS seems to have its way to react. #ifdef _WIN32 if(error.value()==995) return; //Windows spits out error 995 #elif defined(__APPLE__) if(error.value()==45) { //Bug on OS X, it might be necessary to repeat the setup //http://osdir.com/ml/lib.boost.asio.user/2008-08/msg00004.html performReadSetup(setupParameters); return; } #else //Linux if(error.value()==125) return; //Linux outputs error 125 #endif result=resultError; } Serial.h /* * File: Serial.h * Author: Terraneo Federico * Distributed under the Boost Software License, Version 1.0. * * Created on September 12, 2009, 3:47 PM */ #ifndef Serial_H #define Serial_H #include <stdexcept> #include <boost/utility.hpp> #include <boost/asio.hpp> #include "Log.h" /** * Thrown if timeout occurs */ class timeout_exception: public std::runtime_error { public: timeout_exception(const std::string& arg): runtime_error(arg) {} }; /** * Serial port class, with timeout on read operations. */ class CSerial: private boost::noncopyable { public: CSerial(); /** * Opens a serial device. By default timeout is disabled. * \param devname serial device name, example "/dev/ttyS0" or "COM1" * \param baud_rate serial baud rate * \param opt_parity serial parity, default none * \param opt_csize serial character size, default 8bit * \param opt_flow serial flow control, default none * \param opt_stop serial stop bits, default 1 * \throws boost::system::system_error if cannot open the * serial device */ CSerial(const std::string& devname, unsigned int baud_rate, boost::asio::serial_port_base::parity opt_parity= boost::asio::serial_port_base::parity( boost::asio::serial_port_base::parity::none), boost::asio::serial_port_base::character_size opt_csize= boost::asio::serial_port_base::character_size(8), boost::asio::serial_port_base::flow_control opt_flow= boost::asio::serial_port_base::flow_control( boost::asio::serial_port_base::flow_control::none), boost::asio::serial_port_base::stop_bits opt_stop= boost::asio::serial_port_base::stop_bits( boost::asio::serial_port_base::stop_bits::one)); /** * Opens a serial device. * \param devname serial device name, example "/dev/ttyS0" or "COM1" * \param baud_rate serial baud rate * \param opt_parity serial parity, default none * \param opt_csize serial character size, default 8bit * \param opt_flow serial flow control, default none * \param opt_stop serial stop bits, default 1 * \throws boost::system::system_error if cannot open the * serial device */ void open(const std::string& devname, unsigned int baud_rate, boost::asio::serial_port_base::parity opt_parity= boost::asio::serial_port_base::parity( boost::asio::serial_port_base::parity::none), boost::asio::serial_port_base::character_size opt_csize= boost::asio::serial_port_base::character_size(8), boost::asio::serial_port_base::flow_control opt_flow= boost::asio::serial_port_base::flow_control( boost::asio::serial_port_base::flow_control::none), boost::asio::serial_port_base::stop_bits opt_stop= boost::asio::serial_port_base::stop_bits( boost::asio::serial_port_base::stop_bits::one)); /** * \return true if serial device is open */ bool isOpen() const; /** * Close the serial device * \throws boost::system::system_error if any error */ void close(); /** * Set the timeout on read/write operations. * To disable the timeout, call setTimeout(boost::posix_time::seconds(0)); */ void setTimeout(const boost::posix_time::time_duration& t); /** * Write data * \param data array of char to be sent through the serial device * \param size array size * \throws boost::system::system_error if any error */ void write(const char *data, size_t size); /** * Write data * \param data to be sent through the serial device * \throws boost::system::system_error if any error */ void write(const std::vector<char>& data); /** * Write a string. Can be used to send ASCII data to the serial device. * To send binary data, use write() * \param s string to send * \throws boost::system::system_error if any error */ void writeString(const std::string& s); /** * Read some data, blocking * \param data array of char to be read through the serial device * \param size array size * \return numbr of character actually read 0<=return<=size * \throws boost::system::system_error if any error * \throws timeout_exception in case of timeout */ void read(char *data, size_t size); /** * Read some data, blocking * \param size how much data to read * \return the receive buffer. It iempty if no data is available * \throws boost::system::system_error if any error * \throws timeout_exception in case of timeout */ std::vector<char> read(size_t size); /** * Read a string, blocking * Can only be used if the user is sure that the serial device will not * send binary data. For binary data read, use read() * The returned string is empty if no data has arrived * \param size hw much data to read * \return a string with the received data. * \throws boost::system::system_error if any error * \throws timeout_exception in case of timeout */ std::string readString(size_t size); /** * Read a line, blocking * Can only be used if the user is sure that the serial device will not * send binary data. For binary data read, use read() * The returned string is empty if the line delimiter has not yet arrived. * \param delimiter line delimiter, default="\n" * \return a string with the received data. The delimiter is removed from * the string. * \throws boost::system::system_error if any error * \throws timeout_exception in case of timeout */ std::string readStringUntil(const std::string& delim="\n"); ~CSerial(); private: /** * Parameters of performReadSetup. * Just wrapper class, no encapsulation provided */ class ReadSetupParameters { public: ReadSetupParameters(): fixedSize(false), delim(""), data(0), size(0) {} explicit ReadSetupParameters(const std::string& delim): fixedSize(false), delim(delim), data(0), size(0) { } ReadSetupParameters(char *data, size_t size): fixedSize(true), delim(""), data(data), size(size) { } //Using default copy constructor, operator= bool fixedSize; ///< True if need to read a fixed number of parameters std::string delim; ///< String end delimiter (valid if fixedSize=false) char *data; ///< Pointer to data array (valid if fixedSize=true) size_t size; ///< Array size (valid if fixedSize=true) }; /** * This member function sets up a read operation, both reading a specified * number of characters and reading until a delimiter string. */ void performReadSetup(const ReadSetupParameters& param); /** * Callack called either when the read timeout is expired or canceled. * If called because timeout expired, sets result to resultTimeoutExpired */ void timeoutExpired(const boost::system::error_code& error); /** * Callback called either if a read complete or read error occurs * If called because of read complete, sets result to resultSuccess * If called because read error, sets result to resultError */ void readCompleted(const boost::system::error_code& error, const size_t bytesTransferred); /** * Possible outcome of a read. Set by callbacks, read from main code */ enum ReadResult { resultInProgress, resultSuccess, resultError, resultTimeoutExpired }; boost::asio::io_service io; ///< Io service object boost::asio::serial_port port; ///< Serial port object boost::asio::deadline_timer timer; ///< Timer for timeout boost::posix_time::time_duration timeout; ///< Read/write timeout boost::asio::streambuf readData; ///< Holds eventual read but not consumed enum ReadResult result; ///< Used by read with timeout size_t bytesTransferred; ///< Used by async read callback ReadSetupParameters setupParameters; ///< Global because used in the OSX fix }; #endif //CSerial_H -- [logo Aston] MIKAEL PLOUHINEC miplouhinec(a)sqli.com T�l : +33(0) 2 51 79 77 40 - Mob : +33(0) 6 80 23 21 28 www.sqli.com - www.aston-ecole.com [View Less]

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[boost::iterators] Missing typedefs in v1.57
by news.gmane.org 01 Dec '14

01 Dec '14

The typedefs for difference_type and reference used to be in scope for classes derived from iterator_facade. Since v1.57 they have to be declared thus: typedef typename iterator_facade_::difference_type difference_type; typedef typename iterator_facade_::reference reference; This seems out of place for a class that was designed to reduce boiler plate code. However, if the change was intentional, please document it. Thanks, Keith MacDonald

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Reverse for loop with boost::adaptors::reverse crashes
by Filip Konvička 28 Nov '14

28 Nov '14

Hi, I was trying to replace BOOST_REVERSE_FOREACH with the standard range-based for loop. #include <boost/range/adaptor/reversed.hpp> #include <boost/foreach.hpp> #include <vector> #include <iostream> std::vector<int> getv() { return std::vector<int>{1,2,3}; } int main(int argc, char* argv[]) { // works fine: BOOST_REVERSE_FOREACH(int i, getv()) std::cout << i << std::endl; // crashes: for(int i : boost::adaptors::reverse(… [View More]

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Boost.Log: default sink auto flush
by Mathias Gaunard 27 Nov '14

27 Nov '14

It would be very useful if the default sink could be made to auto flush. Is there any way to do this? I do not want to add a new sink, since the default sink cannot be replaced.

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